Who is "sixteen, going on seventeen"?
Answer Liesl
The song is a duet between two teenagers, Liesl and her beau Rolf, who's all of one year older yet imparts worldly advice to his junior belle:
You need someone/Older and wiser/Telling you what to do/I am 17 going on 18/I'll take care of you
Asked by Susanna Henke · Last updated 5 years ago · 1.2K views · SOURCE